Burner construction



Sept. 16, 1941. A. J. YEAGER BURNER CONSTRUCTION Filed July l5, 1938INVENTOR.

' QkZZO/z J7 ATTORNEY 5.

Patented Sept. 16, 1941 BURNER CONSTRUC TION Anton J. Yeage WisconsinRap ids, Wis, as

signor to Prentiss Wabers Products 00., Wisconsin Rapids, vWis., acorporation of Wisconsin.

ApplicationJuly 15, 1938, Serial No. 219,323 rol -1m. (01. 158-42) Thisinvention relates to a new and improved liquid fuel burner and moreparticularly to a burner adapted for'llSe with the less volatile liquidfuels such as kerosene or the like.

It has heretofore been generally customary to use liquid fuels such "asgasoline, with camp stoves or other cook stoves or heaters, which volatilize the liquid fuel and burn it as a gas. This is for the reasonthat it requires considerable heating in a generator tube or equivalentchamber to volatilize kerosene or less volatile liquid fuels to anextent adequate for sustained and efficient combustion as a gas. In somecases, as for example in my copending application, Serial No. 125,566,filed February 13, 1937, I have shown a construction in which gasolineor similar fuel is used to preheat the main burner to an extentsufficient to volatilize kerosene or the like, after which thecontinuous use of the burner is with kerosene as its fuel. These burnersdesigned for starting with one fuel and continuing combustion withanother, involve complications in that they require separate tanks or adivided tank, and multiple fuel passages. They are also undesirable inthat they require the user to provide two fuels. In addition, they loseone of the advantages of the kerosene burner in that it is necessary forthe user to have in the stove a small quantity of the more volatile andmore dangerous gasoline.

It is an object of the present invention to provide a construction whichutilizes kerosene or similar fuels, both for preheating and forcontinuous combustion.

It is a further object to provide a preheater burner suitable for usewith heavier fuels which may be lighted by a match without delay.

It is an additional object to provide a construction of this characterwhich is simple in design and operation and adapted for commercialproduction and use.

Other and further objects will appear as the description proceeds.

I have shown a preferred embodiment of my invention in the accompanyingdrawing in which- Figure 1 is a fragmentary plan view of a liquid fuelstove with my improved preheater burner associated therewith;

Figure 2 is an enlarged sectional view of the preheater burner;

Figure 3 is a view of Figure 2 as seen from the right, with the valve inclosed position; and

Figure 4 is a view similar to Figure 3 but with the valve in openposition.

' Referring first to Figure 1, thermain burner generator tube. II issupported from the member 12 .and. provided with a valve controlled bymeans of the handle l3. The liquid fuel. is introduced into thegenerator tube throughthe pipe M. The fuel is discharged from thegenerator tube into the mixing passage l5, which turns down under-thegenerator tube II at- |6. This portion lfi ofthe mixing tubeis providedwith the burner openings "and Hi; The end of the mixing tube |Bdischarges into theimanifold Iii-which is connected to suitable types ofburners, not shown. I

The preheater burner-construction includes a burner body 20 which isprovided with a liquid fuel inlet 2| and an air inlet 22. The burnerbody 20 contains the liquid fuel passage 23 which is surrounded by theair chamber 24. The passage 23 is provided with the small radial opening25 which communicates with the air chamber 24. The liquid fuel inlet 2|communicates with the fuel passage 23 and the air inlet 22 communicateswith the air chamber 24 at a point out of alignment with the small airport 25. The

passage 23 discharges through the fiat face 26 of the burner body. Theburner body is provided with the lug 27 through which passes the rod 28carrying the funnel-like member 29 which serves to direct the flame andproducts of combustion from the preheater burner against the generatortube II. The rod 28 is held in the lug 21 by the set screw 30.

The valve shaft 3| is journalled in the burner body 20 and has a crossarm 32 keyed to its end by means of the flattened portions 33 of the endof the shaft and the cotter pin 34. One end of this arm 32 has threadedtherein the pointed set screw 35, the point of which enters a conicalseat 36 in the valve closure member 31. The second end of the arm 32 isprovided with a slotted opening 41 through which passes the stop member38. This stop member 38 extends from a supporting member 39 which issecured to the lug 40 extending from the burner body 20. The

thrust washer 4| is fitted about the shaft 3| and j bears against theburner body 20. The coil spring 42 is also fitted about the valve shaft3| and is held between the thrust washer 4| and the second thrust washer43, which latter is held in place on the shaft 3| by means of the pin44. As shown in Figure 1, the shaft 3| is provided with an operatinghandle 45.

In the use of the device, liquid fuel, such' as kerosene, is supplied tothe passage 23 through the inlet 2| and air under pressure, normallydrawn from the air in the fuel tank above the fuel, is introduced intochamber 24 through the inlet 22. This air enters the fuel passage 23through the small port 25 and mixes with the liquid fuel. The handle 45is turned in a counterclockwise direction to open the port in the flatface 26 of the burner body by moving the valve closure 31 to theposition shown in Figure 4. A mixture of air and atomized fueldischarges from the port and may be ignited by means of a match. Theflame and products of combustion are directed by the member 29 againstthe main generator tube ll of the burner. After the generator valve hasbecome heated, the main fuel valve l3 may be opened and the fuel will begasified by the hot generator valve. As soon as the main generatorburners I! and i8 ignite, the generator valve handle 45 may be turned toclose off the preheater by closing the valve and bringing it to theposition shown in Figure 3. The flame from the preheater may be directedagainst the generator adjacent themain heater burners l1 and [8 so thatthe ignition of these. burners will :take place automatically and whenthey are ignitedit is .a signal to the operator that. thepreheaterburner may be turned off.

i The spring 42. serves to hold .e valve closure 31 firmly against the.flat face 26 of the preheater burner body. Its universal connection withthe arm 32. permits the valve. closure to adjust itself to seat in amanner to make a, perfect closure of the preheater bnrn n. The arm. 32ope at s to give a balanced pressure against the yalve closure 31 byreason of th iact that. the oppos te end of the arm 32 bears a ainst thesupporting. memher 39. The slotted opening 41 serves to limit valvemovement to that necessary to properly close or completely uncover thedischarge end of the fuel passage 23.

The small rod 28 which carries the funnel-like flame directing member 29is important in that this small connection minimizes heat transferbetween the member 29 and the burner body so that expansion of parts orvariable preheating of the mixture in the burner body is reduced and amore uniform combustion is assured.

While I have shown a preferred embodiment of my invention it will beunderstood that it is capable of change and modification to meet varyingconditions and requirements and I contemplate such variations as comewithin the spirit and scope of the appended claim.

I claim:

A liquid fuel burner comprising a burner body, the body having anaxially extending cylindrical chamber ther in. sai chamb r h in aredu dp rti n extendin to t e di cha ge fac o ...th burner body, a tubeconstitutingafuel passage n in axi lly hrou h th ham er and fi in cl sey in'the redu ed po tion of the a b r, sa dtu e havin a radi l yex e d gp ing intersecting the axial opening therein, means f tr duc n f e intoth ub and for closing th rear end of th cylind cal chamb r, t urner bodyhaving an air nlet op g therein communi atin with the lateral wal c v thcylind ieal ham e at a p int o t of alignmen th the radia o en in h fu ltub-en

